Evolution of sedimentary systems tracts in the Tarfaya Basin (Moroccan Atlantic Margin) from the Cretaceous to the Present: Influence of structural evolution and eustasy

塔尔法亚盆地（摩洛哥大西洋边缘）从白垩纪至今沉积体系域的演化：构造演化和海平面平衡的影响

• 批准号: 41919248
• 负责人: Professor Dr. Thomas Aigner
• 金额: --
• 依托单位: Arbeitsgruppe Sedimentgeologie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2007
• 资助国家: 德国
• 起止时间: 2006-12-31 至 2010-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/41919248?language=en
• 关键词: Evolution; sedimentary; systems; tracts; Tarfaya

Mixed carbonate/siliciclastic systems are most sensible to baselevel variations governed by the structural evolution of the basin and eustatic sealevel. We aim to quantify the reaction of such a sedimentary system in response to the structural evolution of the passive continental margin of southern Morocco (Tarfaya). This passive margin has served as a cornerstone in the development of the first seismic and sequence stratigraphic concepts and the establishment of eustatic curves. However, the area is more complex and exhibits a unique transition between a relative undisturbed passive continental margin to the South, governed mostly by the thermal subsidence from the rifting phase and a broad, structurally complex continental margin to the North, reactivated by alpine movements. Paralleling this structural trend to the North, more complex erosional and depositional patterns can be observed that developed since the late Cretaceous. In analyzing these patterns, and balancing the structural evolution, we can study the influence of syn-sedimentary tectonics on sedimentary systems and stratigraphic sequences. We base our study on industry reflection data and will apply 2D structural restoration techniques to palinspastically reconstruct the depositional environments and study the interplay between developing structural evolution, eustasy and sedimentation.

碳酸盐/硅质碎屑混合体系对盆地和海平面构造演化所控制的基准面变化最为敏感。我们的目标是量化这种沉积体系对摩洛哥南部被动大陆边缘(塔尔法亚)构造演化的反应。这一被动边缘是发展第一个地震和层序地层学概念以及建立海平面曲线的基石。然而，该地区更为复杂，在南面相对未受干扰的被动大陆边缘(主要受裂谷阶段的热沉降控制)和北面广阔的、结构复杂的大陆边缘(由高山运动重新激活)之间呈现出独特的过渡。与这一构造走向向北平行的是，可以观察到自晚白垩世以来发育的更复杂的侵蚀和沉积模式。通过分析这些模式，平衡构造演化，可以研究同沉积构造对沉积体系和地层层序的影响。我们的研究以工业反射资料为基础，并将应用二维构造恢复技术从古生物角度重建沉积环境，研究发育的构造演化、隆升和沉积之间的相互作用。